When it comes to manufacturing large hollow plastic parts, nothing beats the process of rotomolding. Compared to other molding or casting processes like injection or blow molding, rotomolding is exceptionally cost efficient and the products produced are also of better quality.

Popularity of The Rotomoulding Process

In 1980s the rotational moulding process was in demand by larger material suppliers around the world. And to increase the demand, new materials and grades Popularity of The Rotomoulding Process became available in the market. Storage tanks of all sizes and shapes typically made available in the industry in various compositions. By the year 1984, rotomoulding became the process of choice for manufacturing inexpensive whitewater and sea kayaks. By improved scientific understanding of the rotomoulding process including the development of a system for continuous in-mould temperature measurement called the "Rotolog" system.

According to the current market conditions and choices current research involve lowering the cycle times and improving the quality of parts. The technic pressurization offers some hope in lowering the cycle times as applying a small pressure at the right point in the heating phase. This process was majorly dependent on the trial and error process. Also, it required an experienced operator in order to judge when the part should be removed from oven, and when the part is cool enough to be taken off from the mold. Technology has improved in recent years, allowing the air temperature in the mold to be monitored, removing much of the guesswork from the process. This will produce parts with lesser bubbles in a shorter amount of time than at atmospheric pressure.

By the latest technics and research is into reducing the time span as well as improving high quality output. The most promising and vital area is in mold pressurization. This pressure delays the separation of the part from the mold wall due to shrinkage during the cooling phase, aiding cooling of the part. The main drawback to this is the danger to the operator of explosion of a pressurized part. This has prevented adoption of mold pressurization on a large scale by rotomolding manufacturers.

Due to volatile and dynamic rotomoulding machines which are present in the market made this process of moulding more demanding and unique. As mention before there are various types of rotomoulding machines like:

Rock and roll machine

Clamshell machine

Carousel machine

Shuttle or swing arm machine

Vertical or up & over rotational machine

So these are the machines which makes a vast difference and demands in the market as well as plays very essential role in rotomoulding process.